package com.ny.demo2;

public class BankPay implements Pay {
    double m =100;
    @Override
    public void pay(double money){
        if (m<money){
            System.out.println("你的余额不足");
        }else {
            System.out.println("你消费了"+money);
            m=m-money;
            System.out.println("你的余额为"+m);
        }
    }
}
